Heel-lift cutter.



. 11.*W. PERRY.

HEEL LIFT GUTTER.

.a ZZ

RW. PERRY. HEEL LIFT GUTTER. APPLICATION `FILEI) JULY 1, 1908.

Patented Feb. 9, 1909.l

2 SHEETS-SHEET 9.

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To all whom it may'concem: l Y 4 No..911,'eo5.

.STATES PATENT OFFICE.

EEUBENT'W. rERRr, or STONEHAM, MASSACHUSETTS, VAssIeNoR or oNE-HALETO GEORGE H. rSTEVENS, OF MELROSE, MASSACHUSETTS.

f nEELLLnT CUTTER.'

. top lift with a beveled margin, that is to say, it is desirable that the curved edge of `the lift'be inclined so .as to torm a somewhat` obtuse angle with the trea'dface ofthe top lift. `It is also desirable that the breast edge of the lift be substantially .at a right angle with the tread face of the lift. v Heretofore, lift-cutting edges ada tedto form the curved and vbreasted es jo a lift,

simultaneously,xhave been rigi y connected' to form a-liftshaped cttin edge,.the cutter |having a beveled facewhic forms onefside,

o the cutting eclge of thel curved body por-, tion ofthe die, Vthe portion of the cutting edge which vforms the breast having its'inner side substantially atri ht angleswith the sides of thesheet ofleater on which the die acts. A'Whilea cutting die of this character is adapted to form va llift havinga beveled curved edge, the frigid connection between the body and lift cutting portionsjof the die causes such acom ression of the'liftw-ithin vthe die that lthe li is distorted and bent up-v wardly at its corners, so that its# f aces, in-

. stead ofbeingzsubstantiallyat, are -inore or less dished, and given .a bulging appearance on one side and a convex yappearance on the op osite 1 5 y invention has for its object to provide j a heel-cutting die adapted tov cutout lifts.' having beveled curved edges withoutdi'storting or bending the-lifts, the sidesof the "lift being in practically the same'at condition as A.the sides ofthe sheet ofsole leather from which they are cut. l. y l The invention .is` embodied in a heel lift cutter comprising a body cutting member having a-curved resilient cuttin l edge,usually practically "U-shaped, land a' eveled inner side which V:terms one .side ,ofj the cutting edge, and #breast cutting member,.the cut- Speciication of Letters Patent Application mea my 1, 190s. serial N'o. 441,347.

- pleted lift are left flat.

.verse section of a' the side. portions of 'the cutting e ting edge of which is adapted to be displaced Patented Feb. 9, 190 9.

outwardly by the pressure against it of the material being cut, the 'arrangement beingl kSuch that when the cutter ispressed into a sheet 'of sole leather, Ithe beveled inner sur? faceof the curved member will cause the curved-cutter to expand, and will, at the sameV time, force the material of the 'lilft beingcut against the 'breast cutting member,

slightly displacing the latter, the result being an expansion'of the cutter to such an extent Ythatthe difference between the 'areas ofthe two faces due to the bevel of the curved edge is compensated for, and the sides of the com- Of the accompanying drawings `forming a part of this specification, Figure 1 represents a side elevation of alift-cuttingdie embody# ing my invention. 'Fig. 2 represents atop plan view 'of `the same. Fig. -3 lrepresents a section on line 3 3 of Fig. 2. Fig. 4 represents a perspective view of the lower end portion of the bodycutting member of my improved die. Fig. 5r e resents a side fele vation showing a modl cation herelna-fter' Fig. 6 represents a section on referred to. line6-6 of Fig. 5. Fig. 7 represents a plan view and Fig. k8 a side viewof a dierent lform of die embodying my invention. Figs.

9 and 10. represent sectional views illustrat- -ing the4 operation -of my improved die.

Fig. 11 represents a 'diagrammaticv view showing a plan ofthe cutting edges of the two members of the die. Fig. '12 represents a ilongitudinalsection, and Fig. 13 a transtop lift cut by my improved'die.

The same characters of reference indicate the sameparts in all the figures;

ln the drawings, 12 represents the body i' cutting member of aV cutting die, said member having a 'curved cutting edge 13, which is practically U-shaped, :that isto sa it 'is adapted to form thecurved margin o `a `heel topl lift. The end portions 14, '14 'of ,the-

member '12 are 'free to approach vand recede -from "each other, 't a limited extent, the( member being suiliciently resilient toiermit e v .to sprin outwardly, as indicated by ful and dotte lIineslin Fig. 11, where .the full lines show'the normal shape of the cuttin g'edge; V 13, and the dotted-.lines show the shape to which it may bel expanded, as hereinafter described.

The inner- `side of the member 12' has a A cross bar 19, and are provided with clampbeveled face 15 which intersects a correspondinglybeveled face on the outer side of the member to form the cutting edge 13.

16 represents the breast-cutting member of the die, this member being made in a separate piece from the member 12, and being held yieldingly against the ends 14 of said member, so'that it-s cutting edge 17 which eX- tends `across the ends of the curved cutting edge 13, as shown in Fig. 11, is adapted to spring slightly away from said ends, as indicated by dotted lines in'F ig. 11.

In the construction shown in Figs. 1, 2, and 3, which represent anelongated liftcutting die, the breast cutting member is provided with an elongated shank which is rigidly secured to the member 12 by means of a clamp Composed ota cross bar 19 and a yoke'20, the ends of which are screw-threaded bolts 21 passing through orifices in the ing nuts 22. When said nuts are tightened, the upper portion ofthe shank -is rigidly attached to the member v12, and the portion between the cross bar- 19 and the cutting edge 17 is s uii'iciently resilient to hold the cutting ed e 17 normally in the position shown in ull lines in Fig. 11, and permit said cutting edge to spring outwardly, as indicated by dotted lines in Fig. 11. When the die thus constructed is applied to a sheet 23 of sole leather, the latter being supported on a cutting bed, and pressureis applied to the die tov force its cutting edges through the leather sheet, the beveled face 15 exerts lateral pressure on the portion of the leather which forms the top. lift, said pressure tending to force the leather against the breast cutting member 16, and at the same time tending to separate the end portions of the curved cutting edge 13. The result of this pressure is the expansion of the cutter formed by the edges 13 and 17, asindicated by dotted lines in Figs. 9, 10, and 11, and

vlto

the formation of a top lift 24 having a beveled curved margin 25, which forms a somewhat obtuse angle with the tread face 26 of the lift. rllhe inner side of the breast cutting member 16 is substantially a-tright angles with the sides of the leather sheet upon which it acts, so that said member in entering the sheet forms abreast 27 which is substantially at right angles with the sides of the lift 24.

The described eXpansibility of the cutting die enables a top lift having the edge formation; described, to be produced Without bending or distorting the sides oit the lift, said sides being left in practically the same condition as they are in the sheet of leather.

In Figs.l 5 and 6, I show a modification in which the breast cutting member is eomposed' of two end portions 29, which bear on the ends of the member 12, and an intermediate bend 30 which projects into the member 12, as shown in Fig. 6, the said breast member having a cutting edge of the same contour, so that the die as a whole is adapted to form a U-shaped lift. The breast member is, in this modiiication, connected with the body member 12 by a clamp composed of a cross bar 19 and a yoke 20, spiral springs 31 being interposed between the cross bar 19 `and the nuts4 22 to' permit the entire breast member to yield and move slightly away from the body member 12.

In Figs. 7 and 8, I show 'a die adapted to be used in connection with a handle 33. The only difference between the die shown in these igures and that shown in Figs. 1, 2 and 3 isin the length of the cutting members, and in. the means employed for holding the cutting edge of the breast cutting member yi'eldingly against the ends of the cutting edge of the body cutting member. The cutting members 12 and 16 are relatively short, and the body cutting member 12 is provided with a bolt 34 which passes loosely through ani orice in the breast cutting member 16, and is provided with a nut 35, between which and the breast cutting member 16 is interposed a spiral spring 36. IIhe s ring yieldingly holds the cutting edge o' the breast cutting member 16 against the ends of the cutting edge of the body cutting member 12, and is in this respect an equivalent of the resilient shank shown in Figs. 1 and 3.

In the form of die shown in Figs. 7 and 8, the beveled face 15 is relatively wide, itsA width exceeding the thickness of the leather, so that the contraction of the body member 12 after it is relieved from pressure, automatically ejects the-litt from the die. When the beveled face 15 is relatively narrow., its Width being approximately the same or less than the thickness of the leather, as shown in Figs. 3, 4, 9 and 10, the cut lifts are permitted to more upwardly and accumulate in the die, and may be removed from the top.

I find that a lift-cutting die having a breastcutting portion and a body -cuttmg portion made in separate parts, is more durable than a die in which both ortions are made as a single part, as heretofore, because there is no possibility of breakage or cracking of the cutting edge at the angles formed by the intersection of the body and breast cutting edges.

In a single piece die, the out-Ward pressure exerted on the 'walls of the die by the lifts within it, tends to erystallize the metal of Vthe die at the corners and is liable to cause tion, Whether said die is adapted to be ez;-

panded as described or not, it being obvious that by locating the clamp shown in Figs. 1, 24and 3, suihciently near' the cutting edges 13 and 17, said edges would be rigidly conlined so that the die would be non-expansible. Y

An essential characteristic of the bodycutting member 12 is the adaptability of its Vcutting edge to expand ,freely during the cutting operation, as indicated in Figs.` 9, l and 11, thisfreedom of the cutting edgeto v expand enabling it to produce a lift which is of greater areaatone side 'than at the other.

ln the' embodiment. ot vthe invent ion shown in Figs. 7 and 8, thewidtb of the beveled A face l5, which is greater than the thickness of. the lift, enables the expanded cutting member, in contracting, to eject the lift, las

. described. v

" I claim:

1; A heel lift cutter having' a" resilient cutting edge which is reeto expand when in operation, and a beveled inner side adapted to cause the expansion of said edge by contact with the work.

2. A heel lift cutter comprising a body- 'Y cutting member having a resilient cutting vedge which Ais free to expand when in operation, and a beveled dinner side, and a breastcutting. member, the cutting edge of which is adapted to be displaced outwardly by .the pressure of the work against it.

3. An expansible heel ,lift cutter having means for engaging the work during ,the

cutting operation, to cause the expansion of' the cnttelg'and produce a lift with a beveled edge, the cutter being free toexpand when in operation.

4. A heel lift cutter comprising a resilient body-cutting member adapted to vform a curved mar which is beveled relatively A to the sides of the lift, said'member being free to expand when in operation, and a breast-cuttlng member adapted to form4 a breastwhich is substantially at right angles with the said sides, said members being made in separate parts.

- which exten means being' provided for normally holding the breast-cutting edge in yielding contact with' said ends.

6. A heel lift cutter comprising a bodycutting member having a U-shaped resilient cutting edge, and a beveled inner side, whereby the said cutting edge is adapted -to form abeveled margin on a lift, said mem-l ber being free to expand when in operation,

and a breast-cutting member, the cutting edge of which extends across the ends of the U-shaped cutting member, and is normallyheld in yielding contact therewith, the said breast cutting member being adapted to form a breast which is substantially at right angles with the sides of the lift.

7. A heellift cutter comprising a bodycutting member having a Ufshaped cutting edge, and a beveled innerside, said mem- Yber being free to .expand when 1n operat1on,

a breast-cutting member having a'cutting edge which extends across the --ends of the tl-shaped cutting edge, and is separable therefrom, and means for yieldin'gly holding the edge of the breast-cutting member 4 against said ends.

85A heel lift` cutter comprising a body cuttingmemberV which is 'free to expand when in operation, and a breast cutting member made in separate parts.

9. A heel lift cutter comprising a body cutting member which 'is ee to expand when 1n operation, and a breast cutting member made in separate parts,- and means for detachably connecting said parts.

10. A heel lift cutter comprising a bodycutting member having a resilient cutting edge and abeveledv inner side, said member being' free to expand when in operation, and

a breast-cutting member, the cutting edge of which is'adapted to bedisplaced outwardly by the pressure of the work against it, the

said beveled inner side being wider than the thickness of the material from which the lifts are out, so that it acts in contracting from its expanded position to eject thev lifts from the die.

in testimonywhereof l have atlixed my signature, in presence of two witnesses.

REUBEN W. PERRY. Witnesses: y

. C. F. BROWN, P. W. Pnzznm. 

